Dense Chocolate Cake with Ganache and Liqueur-Infused Cherries

• 10½ oz (297 g) semisweet chocolate chopped
• 6 oz (¾ cup) unsalted margarine
• 6 large eggs separated at room temperature
• ¾ cup packed light brown sugar
• ¼ cup all-purpose flour
• ¼ cup cherry liqueur
• 1 tsp pure vanilla extract
• ½ tsp kosher salt

• • • • 3½ oz (100 g) good quality chocolate

¼ cup whipping cream3 Tbsp cherry or coffee liqueur

Spiked Cherry Garnish